Daikin FTXS20CVMB - Service Manual

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C-Series

[Applied Models]

zInverter Multi : Cooling Only

zInverter Multi : Heat Pump

Si12 - 411A

Main Page

Table of Contents3
Introduction8
Safety Cautions8
Part 1 List of Functions12
List of Functions13
Cooling Only Models13
Heat Pump Models19
Part 2 Specifications29
Specifications29
Indoor Units - Cooling Only29
Outdoor Units - Cooling Only41
Indoor Units - Heat Pump47
Outdoor Units - Heat Pump62
Part 3 Printed Circuit Board Connector Wiring Diagram68
Printed Circuit Board Connector Wiring Diagram69
Wall Mounted Type 20/25/35 Class69
Wall Mounted Type 50/60/71 Class72
Duct Connected Type74
Floor / Ceiling Suspended Dual Type75
Floor Standing Type77
Outdoor Units80
Part 4 Function and Control82
Main Functions83
Frequency Principle83
Power-Airflow Dual Flaps, Wide Angle Louvers and Auto-Swing85
Fan Speed Control for Indoor Units86
Programme Dry Function87
Automatic Operation88
Night Set Mode89
Intelligent Eye90
Home Leave Operation92
Inverter Powerful Operation93
Other Functions94
Function of Main Structural Parts96
Main Structural Parts96
Function of Thermistor97
Control Specification101
Mode Hierarchy101
Frequency Control102
Controls at Mode Changing / Start-Up104
Discharge Pipe Control105
Input Current Control105
Freeze-Up Protection Control106
Heating Peak-Cut Control106
Fan Control107
Moisture Protection Function 2107
Defrost Control108
Low Hz High Pressure Limit109
Electronic Expansion Valve Control109
Malfunctions114
Forced Operation Mode115
Wiring-Error Check116
Additional Function118
Part 5 System Configuration120
System Configuration121
Operation Instructions121
System Configuration Part121
Instruction122
Contents and Reference Page122
Safety Precautions123
Names of Parts125
Preparation before Operation137
AUTO · DRY · COOL · HEAT · FAN Operation140
Adjusting the Air Flow Direction142
POWERFUL Operation148
OUTDOOR UNIT SILENT Operation149
HOME LEAVE Operation150
INTELLIGENT EYE Operation152
TIMER Operation156
Note for Multi System158
Care and Cleaning160
Troubleshooting170
Part 6 Service Diagnosis174
Caution for Diagnosis175
Troubleshooting with the Operation Lamp175
Problem Symptoms and Measures177
Service Check Function178
Code Indication on the Remote Controller179
Error Codes and Description of Fault179
Troubleshooting180
Indoor Units180
Outdoor Units181
Indoor Unit PCB Abnormality182
Freeze-Up Protection Control or High Pressure Control183
Fan Motor or Related Abnormality185
Thermistor or Related Abnormality (Indoor Unit)188
Shutter Drive Motor / Shutter Limit Switch Abnormality189
Signal Transmission Error (between Indoor and Outdoor Units)190
Unspecified Voltage (between Indoor and Outdoor Units)191
Freeze-Up Protection Control192
OL Activation (Compressor Overload)194
Compressor Lock195
DC Fan Lock196
Input over Current Detection197
Four Way Valve Abnormality199
Discharge Pipe Temperature Control201
Position Sensor Abnormality202
CT or Related Abnormality203
Thermistor or Related Abnormality (Outdoor Unit)205
Electrical Box Temperature Rise207
Radiation Fin Temperature Rise209
Output over Current Detection211
Insufficient Gas213
Low-Voltage Detection215
Anti-Icing Function in Other Rooms / Unspecified Voltage (between Indoor and Outdoor Units)216
Check217
How to Check217
Part 7 Removal Procedure228
Outdoor Unit (80 / 90 Class)229
Removal of Outer Panels229
Removal of Propeller Fans232
Removal of Electrical Box233
Removal of PCB240
Removal of Fan Motor243
Removal of Electronic Expansion Valve and Thermistor245
Removal of Sound Insulation and Reactor246
Removal of Shunt248
Removal of Solenoid Valve and Four Way Valve249
Removal of Compressor251
Outdoor Unit (50 / 52 / 58 / 68 / 75 Class)253
Removal of Outer Panels253
Removal of Electrical BOX254
Removal of PCB258
Removal of Fan Motor261
Removal of Sound Insulation262
Removal of Four Way Valve Coil, Solenoid Valve Coil263
Electronic Expansion Valve Coil and Thermistor263
Removal of Four Way Valve, Solenoid Valve and Shunt265
Removal of Solenoid Valve and Shunt266
Removal of Compressor267
Part 8 Others268
Others269
Test Run from the Remote Controller269
Jumper Settings270
Part 9 Appendix272
Piping Diagrams273
Indoor Units273
Outdoor Units277
Wiring Diagrams284
Indoor Units284
Outdoor Units287

Daikin FTXS20CVMB - Service Manual

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